I have got my laptop wireless connect to ADSL router LinkSys WAG54G, and My desktop PC with dialup connection .
From both PCs I can ping any sites on the net, but when I try to ping each other I could not (from PC to laptop, and from laptop to PC), I do not have any firewall on both PC, though I tried to ping gateway for linksys router from the desktop PC (through internet not network), I could not.!!!!
Is there any setting I have to be aware of it?